Halloysite tubes in ester-cured phenolic bonded foundry shapes
AssigneeASK Chemicals GmbH
InventorSritama Kar
Life of this patent
Estimating the term…
Abstract
A no bake process is provided for preparing a foundry shape. A major amount of an appropriate foundry aggregate, especially a sand that has been mechanically-reclaimed, is mixed with an amount of halloysite tubes. A binder system, especially a water-based binder, such as an aqueous alkaline phenolic resole resin, is added to the mixed aggregate and halloysite, and a liquid co-reactant for curing the binder is also added. By intimately mixing the components, a foundry molding compound is formed and it can be placed into a mold or patter to cure into a foundry shape. When removed from the mold or pattern, the foundry shape can be used to cast molten metal.
Claims15
A foundry mix composition, comprising:
- a water-based binder;
- a liquid co-reactant for curing the binder;
- a foundry aggregate;
- and
- an amount of halloysite tubes;
- wherein the binder is kept separate from the liquid co-reactant, the foundry aggregate and the halloysite tubes until the time for use.
Dependencies are inferred from the claim text.